Kondo disorder and non-Fermi-liquid behavior in UCu5-xPdx and CeCu5.9Au0.1
Creators
- 1. Department of Physics, University of California, Riverside, California 92521-0413 (United States)
- 2. Institute for Particle Physics, Eidgenoessiche Technische Hochschule-Zuerich, CH-5232 Villigen PSI (Switzerland)
- 3. Mail Stop K764, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
- 4. Kamerlingh Onnes Laboratorium, Rijksuniversiteit Leiden, 2300 RA Leiden (The Netherlands)
- 5. Department of Physics, University of Florida, Gainesville, Florida 32611 (United States)
- 6. Physikalisches Institut, Universitaet Karlsruhe, D-76128 Karlsruhe (Germany)
- 7. Laboratorium fuer Festkoerperphysik, Eidgenoessiche Technische Hochschule-Hoenggerberg, CH-8903 Zuerich (Switzerland)
Description
Muon spin rotation (μSR) has been used to probe non-Fermi-liquid (NFL) behavior in the heavy-fermion alloys UCu5-xPdx, x=1.0 and 1.5, and CeCu5.9Au0.1. Zero-field μSR puts an upper bound of ∼0.01μB/U atom on any static magnetism in UCu5-xPdx, which is too weak to affect the transverse-field μSR linewidth or to give rise to NFL behavior. In agreement with NMR results, μSR spectra in transverse fields suggest that a broad distribution of Kondo temperatures (open-quote open-quote Kondo disorder close-quote close-quote) is important in UCu5-xPdx. NFL anomalies at temperature T then arise from open-quote open-quote free close-quote close-quote spins for which TK<T. Comparison of μSR and NMR linewidths also indicates short-range spatial correlation of the Kondo disorder in UCu5-xPdx, in agreement with the local character of the dynamic susceptibility inferred from neutron scattering experiments. In CeCu5.9Au0.1 the data suggest significant Kondo disorder only if the spatial correlation is long ranged, which is not indicated by other properties of this alloy. copyright 1996 The American Physical Society
Additional details
Publishing Information
- Journal Title
- Physical Review. B, Condensed Matter
- Journal Volume
- 54
- Journal Issue
- 18
- Journal Page Range
- p. 13000-13008.
- ISSN
- 0163-1829
- CODEN
- PRBMDO
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 28007173
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- CERIUM COMPOUNDS; COPPER COMPOUNDS; ELECTRONIC STRUCTURE; GOLD COMPOUNDS; INELASTIC SCATTERING; INTERMETALLIC COMPOUNDS; KONDO EFFECT; MUON SPIN RELAXATION; NEUTRON BEAMS; NMR SPECTRA; PALLADIUM COMPOUNDS; URANIUM COMPOUNDS
- Descriptors DEC
- ACTINIDE COMPOUNDS; ALLOYS; BEAMS; NUCLEON BEAMS; PARTICLE BEAMS; RARE EARTH COMPOUNDS; RELAXATION; SCATTERING; SPECTRA; TRANSITION ELEMENT COMPOUNDS